- 2. Effective section properties - For sections subject to axial compression

Change product type

Change selection properties

Section designation		Gross area	S355
Size	Thickness		Classification	Effective area	A_eff / A
h x h	t	A		A_eff
mm	mm	cm²		cm²
300x300	31.0	175	Class 4	175	1.000
	30.0	170	Class 4	170	1.000
	29.0	165	Class 4	165	1.000
	28.0	159	Class 4	159	1.000
	27.0	154	Class 4	154	1.000
	26.0	148	Class 4	148	0.998
	25.0	143	Class 4	139	0.971
250x250	26.0	123	Class 4	123	1.000
	25.0	119	Class 4	119	1.000
	24.0	114	Class 4	114	1.000
	23.0	110	Class 4	110	1.000
	22.0	105	Class 4	105	1.000
	21.0	101	Class 4	98.3	0.977
	20.0	96.0	Class 4	90.5	0.943
	19.0	91.4	Class 4	83.0	0.908
	18.0	86.7	Class 4	75.6	0.872
	17.0	82.1	Class 4	68.5	0.834
200x200	21.0	79.9	Class 4	79.9	1.000
	20.0	76.3	Class 4	76.3	1.000
	19.0	72.7	Class 4	72.7	1.000
	18.0	69.1	Class 4	69.1	1.000
	17.0	65.5	Class 4	64.5	0.985
	16.0	61.8	Class 4	57.7	0.934
	15.0	58.1	Class 4	51.7	0.890
	14.0	54.4	Class 4	46.0	0.845
	13.0	50.7	Class 4	40.4	0.797
	12.0	46.9	Class 4	35.1	0.748
180x180	18.0	61.9	Class 4	61.9	1.000
	17.0	58.7	Class 4	58.7	1.000
	16.0	55.4	Class 4	55.4	1.000
	15.0	52.1	Class 4	50.1	0.962
	14.0	48.8	Class 4	44.6	0.915
	13.0	45.5	Class 4	39.4	0.865
160x160	16.0	49.0	Class 4	49.0	1.000
	15.0	46.1	Class 4	46.1	1.000
	14.0	43.2	Class 4	43.0	0.995
	13.0	40.2	Class 4	38.0	0.944
	12.0	37.3	Class 4	33.2	0.890
150x150	16.0	45.7	Class 4	45.7	1.000
	15.0	43.0	Class 4	43.0	1.000
	14.0	40.3	Class 4	40.3	1.000
	13.0	37.6	Class 4	37.2	0.989
	12.0	34.8	Class 4	32.5	0.934
	11.0	32.1	Class 4	28.1	0.876
	10.0	29.3	Class 4	23.8	0.814
140x140	14.0	37.5	Class 4	37.5	1.000
	13.0	35.0	Class 4	35.0	1.000
	12.0	32.4	Class 4	31.8	0.981
	11.0	29.8	Class 4	27.5	0.922
	10.0	27.2	Class 4	23.3	0.858
	9.0	24.6	Class 4	19.5	0.791
130x130	13.0	32.3	Class 4	32.3	1.000
	12.0	30.0	Class 4	30.0	1.000
	11.0	27.6	Class 4	26.8	0.972
	10.0	25.2	Class 4	22.9	0.907
	9.0	22.8	Class 4	19.1	0.838
	8.0	20.4	Class 4	15.6	0.764
120x120	12.0	27.5	Class 4	27.5	1.000
	11.0	25.4	Class 4	25.4	1.000
	10.0	23.2	Class 4	22.3	0.962
	9.0	21.0	Class 4	18.7	0.891
	8.0	18.7	Class 4	15.2	0.813
	7.0	16.5	Class 4	12.1	0.732
110x110	11.0	23.2	Class 4	23.2	1.000
	10.0	21.2	Class 4	21.2	1.000
	9.0	19.1	Class 4	18.1	0.949
	8.0	17.1	Class 4	14.9	0.870
	7.0	15.1	Class 4	11.9	0.785
	6.0	13.0	Class 4	9.01	0.693
100x100	10.0	19.2	Class 4	19.2	1.000
	9.0	17.3	Class 4	17.3	1.000
	8.0	15.5	Class 4	14.5	0.934
	7.0	13.7	Class 4	11.6	0.846
	6.0	11.8	Class 4	8.84	0.750
90x90	9.0	15.5	Class 4	15.5	1.000
	8.0	13.9	Class 4	13.9	1.000
	7.0	12.2	Class 4	11.2	0.915
	6.0	10.6	Class 4	8.64	0.815
	5.0	8.88	Class 4	6.26	0.705
80x80	8.0	12.3	Class 4	12.3	1.000
	7.0	10.8	Class 4	10.7	0.995
	6.0	9.35	Class 4	8.33	0.891
	5.0	7.86	Class 4	6.09	0.774
75x75	8.0	11.4	Class 4	11.4	1.000
	7.0	10.1	Class 4	10.1	1.000
	6.0	8.73	Class 4	8.15	0.934
	5.0	7.34	Class 4	5.98	0.814
	4.0	5.93	Class 4	4.04	0.682
70x70	7.0	9.40	Class 4	9.40	1.000
	6.0	8.13	Class 4	7.98	0.981
	5.0	6.84	Class 4	5.87	0.859
65x65	6.0	7.53	Class 4	7.53	1.000
	5.0	6.34	Class 4	5.76	0.908
	4.0	5.13	Class 4	3.93	0.766
63x63	6.5	7.85	Class 4	7.85	1.000
	6.0	7.29	Class 4	7.29	1.000
	5.0	6.14	Class 4	5.70	0.929
60x60	6.0	6.91	Class 4	6.91	1.000
	5.0	5.82	Class 4	5.60	0.962
	4.0	4.71	Class 4	3.84	0.815
55x55	5.0	5.32	Class 4	5.32	1.000
	4.0	4.31	Class 4	3.75	0.871
50x50	5.0	4.80	Class 4	4.80	1.000
	4.0	3.89	Class 4	3.63	0.934
45x45	4.5	3.90	Class 4	3.90	1.000
	4.0	3.49	Class 4	3.49	1.000
	3.0	2.66	Class 4	2.17	0.816
40x40	4.0	3.08	Class 4	3.08	1.000
30x30	3.0	1.74	Class 4	1.74	1.000

Values of A_eff not in bold type are the same as the gross area

Only the sections which can be Class 4 under axial compression are given in the table

Design Data

Long products

Flat products

Other

- 2. Effective section properties - For sections subject to axial compression